Difference Between F1 & F2 Terminal Types on Batteries

Batteries come in all shapes and sizes. So do the battery terminals, mainly in Sealed Lead Acid (SLA) Batteries. These batteries are used in medical mobility wheelchairs, uninterrupted power systems (UPS), ride on toys for kids, razor scooters, and more. The SLA batteries commonly use the faston tabs as the terminal type. The F1 (T1) and the F2 (T2) are the terms we all use to refer to the terminals. At first glance, they look very similar. These are flat blade type terminals which stick up at an angle from the top or side of the battery. The F1 terminal is thinner, and the F2 is wider. The F2 is 1/16″ wider than the F1 terminal type (see images below).

F1 & F2 Battery Terminals



The F1 Faston Tab is No. 187 because it is 0.187″ wide. This is equivalent to 3/16″ or 4.75 mm. If your application requires the larger, F2 terminal type, there are adapters available to attach to the F1 and make it compatible with F2 connectors. – T1 to T2 Terminal Adapter

F1 Faston Tab

The F2 Faston Tab is No. 250 because it is 0.25″ wide. That’s 1/4″ or 6.35 mm. The difference between the F1 and the F2 is only 1/16″. That difference in width may appear to be miniscule, but if the application calls for one or the other, we recommend sticking to it. – T2 to T1 Terminal Adapter

F2 Faston Tab

Chrome Battery recommends that you read very carefully on the product pages to make sure the battery terminals will fit your application or call us for any questions! 317-564-4278


One thought on “Difference Between F1 & F2 Terminal Types on Batteries

  • This is interesting. I noticed a long time ago that there were two types, but I didn’t know there were names. I’ll try to remember F1 and F2 terminals. Thanks!

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